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Circuit Quantum Electrodynamics: Coherent Coupling of a Single Photon to a Cooper Pair Box

A. Wallraff·D. I. Schuster·A. Blais·L. Frunzio·R. -S. Huang·J. Majer·S. Kumar·S. M. Girvin·R. J. Schoelkopf
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Abstract

Under appropriate conditions, superconducting electronic circuits behave quantum mechanically, with properties that can be designed and controlled at will. We have realized an experiment in which a superconducting two-level system, playing the role of an artificial atom, is strongly coupled to a single photon stored in an on-chip cavity. We show that the atom-photon coupling in this circuit can be made strong enough for coherent effects to dominate over dissipation, even in a solid state environment. This new regime of matter light interaction in a circuit can be exploited for quantum information processing and quantum communication. It may also lead to new approaches for single photon generation and detection.

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A. Wallraff, D. I. Schuster, A. Blais, L. Frunzio, R. -S. Huang, J. Majer, S. Kumar, S. M. Girvin, R. J. Schoelkopf. 2004-07-13. Circuit Quantum Electrodynamics: Coherent Coupling of a Single Photon to a Cooper Pair Box. https://doi.org/10.1038/nature02851

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